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Ferro-aluminium-boron alloy and its production method

A production method and a boron alloy technology, applied in the field of alloys and iron-based alloys, can solve the problems of reducing the NdFeB yield, increasing slag, and consuming more power, shortening production time, improving yield, and saving energy. Effect

Inactive Publication Date: 2005-08-24
黄湛良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This will directly affect the quality of NdFeB, such as the reduction of the magnetic energy level of the product, and at the same time increase the slag, reducing the yield of NdFeB
In addition, due to the high melting point of ferroboron, which is greater than 1400 ° C, boron segregation will occur in the production of NdFeB, which will affect the quality of NdFeB, and at the same time make the production of NdFeB take a long time and consume more power.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) 100 kg of ferroboron with a boron content of 23%, a particle size of less than 50 mm, and 20 kg of industrial pure aluminum with a particle size of less than 50 mm are put into the intermediate frequency smelting furnace;

[0038] (2) electrified smelting, the furnace temperature is 1500°C, and the smelting time is 2 hours;

[0039] (3) Take it out of the furnace, and cast it into shape with a water-cooled mold equipment with a length of 1m, a width of 0.5m, and a template spacing of 50mm.

Embodiment 2

[0041] (1) 100 kg of ferroboron with a boron content of 18%, a particle size of less than 50 mm, and 5.5 kg of industrial pure aluminum with a particle size of less than 50 mm are put into the intermediate frequency smelting furnace;

[0042] (2) electrified smelting, the furnace temperature is 1450°C, and the smelting time is 3 hours;

[0043] (3) Take it out of the oven, use the flake equipment, the product is 1mm thick, 50mm long, and 30mm wide.

Embodiment 3

[0045] (1) 100 kg of ferroboron with a boron content of 21%, a particle size of less than 50 mm, and 12.5 kg of industrial pure aluminum with a particle size of less than 50 mm are put into the intermediate frequency smelting furnace;

[0046] (2) electrified smelting, furnace temperature 1400 ℃, smelting time is 4 hours;

[0047] (3) Take it out of the oven, use a stripping device, the product is 0.1mm thick and 50mm wide.

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Abstract

An AlFeB alloy used for preparing NdFeB material with high quality and output contains B (12-23 wt.%), Fe (60-84) and Al (4-21), and is prepared from industrial pure aluminium, industrial pure iron, low-carbon steel, and borax or industrial pure boric acid. Its preparing process is also disclosed.

Description

technical field [0001] The invention relates to an alloy, in particular to an iron-based alloy, in particular to an iron-based alloy containing aluminum and boron. Background technique [0002] Ferro-boron alloy is the main raw material for the production of NdFeB permanent magnet materials. In the production of NdFeB, due to the high segregation degree of boron in the ferroboron alloy, there is a large error between the actual content of boron in the ferroboron used and the boron content calculated according to the boron content of the ferroboron. Since the segregation degree of boron in ferroboron is random, the above-mentioned errors generated are unpredictable, so the boron content in the production process of NdFeB is uncertain. This will directly affect the quality of NdFeB, such as the reduction of the magnetic energy level of the product, and at the same time increase the slag and reduce the yield of NdFeB. In addition, due to the high melting point of ferroboron, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/06C22C38/06H01F1/057
Inventor 黄湛良
Owner 黄湛良
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